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Analysis of Ground Subsidence on Gyochon Residential Region of Muan City  

Han, Kong-Chang (한국지질자원연구원)
Cheon, Dae-Sung (한국지질자원연구원)
Ryu, Dong-Woo (한국지질자원연구원)
Park, Sam-Gyu (한국지질자원연구원)
Publication Information
Tunnel and Underground Space / v.17, no.1, 2007 , pp. 66-74 More about this Journal
Abstract
The analysis of ground subsidence stability was conducted for the residential area located on the limestone corrosion zone. For the investigation of the cavity distribution in limestone region, various geophysical investigations such as electroresistivity tomography, electromagnetic prospecting are carried out. Geotechnical field tests with drilling are also carried out for the evaluation of the ground characteristics. Based upon their results, numerical modeling is performed for the simulation and prediction of the ground subsidence with the conditions of cavity geometry and groundwater level. The main factor to cause the ground subsidence is estimated as the draw down of the groundwater level below soil overburden, which disturbs the mechanical equilibrium of ground and drives washing away the overburden soil through the cavity and solace subsidence. It seemed that it is essential to maintain the groundwater level continuously above the shallow cavity for the prevention of the ground subsidence on the limestone corrosion zone.
Keywords
Ground subsidence; Limestone; Cavity; Groundwater level;
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